In 1849, he killed Ross sympathizer David Kell, whom he thought had been involved with his father's assassination, over a horse dispute.[1] Despite having a good argument for self-defense, he fled to Missouri to avoid prosecution.[4] The next year, he joined in the California Gold Rush, but disliked being a miner.[2] While there, he was reunited with his wife and daughter.[5]

His writing career began with poetry (published posthumously)[2] and essays for the Democratic Party before what is now considered the first Native American novel and the first novel written in California, The Life and Adventures of Joaquin Murieta: The Celebrated California Bandit (1854).[1] A fictionalized version of the notorious bandit's story, the tale describes a young Mexican who comes to California to seek his fortune during the Gold Rush and turns to crime after his wife is raped and his brother murdered by white men. This novel, which condemned American racism especially towards Mexicans, later inspired the Zorro stories.[citation needed] Although widely popular, Ridge saw no money from the book's publication—by the time of his death it had not yet even turned a profit.[6]

Ridge was a writer and the first editor of the Sacramento Bee and also wrote for the San Francisco Herald, among other publications.[1] As an editor, he advocated assimilationist policies for American Indians as his father had, placing his trust in the federal government to protect their rights. At the same time, however, he was blind to the ways in which those rights were continually abused by the same government.[2] Despite his novel's stance against racism, Ridge had owned slaves on his Arkansas property[1] and felt that California Indians were inferior to those of other tribes.[5] During the Civil War, Ridge openly supported the "Copperheads" and opposed both the election of Abraham Lincoln as well as the signing of the Emancipation Proclamation, blaming the war on abolitionists.[2]

After the war, Ridge was invited by the federal government to head the Southern Cherokee delegation in postwar treaty proceedings. Despite his best efforts, the Cherokee region was not admitted as a state to the Union.[2] In December 1866, he returned to his home in Grass Valley, California, where he died of "brain fever" (Encephalitis lethargica) on October 5, 1867.[7] He was buried at Greenwood Memorial Park in Grass Valley.[8]

Ridge's novel, one of the earliest by a Native American author, is curious both because it is written not about a Native American subject, but about a Mexican immigrant, and because it is not original but based on a legendary figure widely discussed in the media of the day. Ridge presents the figure of Joaquin Murieta as that of a young, innocent and industrious man who is hampered in his attempts to be successful in the United States by the racism of the people and by the 1850 Foreign Miner's Tax Law, which severely hampered the ability of Latinos to mine for gold. Ridge's version of Murieta becomes a bandit who attracts a large number of associates and who terrorizes the state of California for several months with his gruesome acts of violence. At the same time, Ridge's Murieta is a romantic figure, often showing kindness (especially to women) and relishing the stories about him, even as he keeps his identity so well secret that he can walk through town in broad daylight with no one recognizing him.

Although the novel is fictional, many people took it as fact and some historians even cited it when writing biographical materials on Murrieta.[6]